EP0379715B1 - Carter de gaz à construction légère - Google Patents

Carter de gaz à construction légère Download PDF

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Publication number
EP0379715B1
EP0379715B1 EP89123633A EP89123633A EP0379715B1 EP 0379715 B1 EP0379715 B1 EP 0379715B1 EP 89123633 A EP89123633 A EP 89123633A EP 89123633 A EP89123633 A EP 89123633A EP 0379715 B1 EP0379715 B1 EP 0379715B1
Authority
EP
European Patent Office
Prior art keywords
flange
gas
channels
flanges
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89123633A
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German (de)
English (en)
Other versions
EP0379715A1 (fr
Inventor
Bernd Konert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Comprex AG
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Comprex AG
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Filing date
Publication date
Application filed by Comprex AG filed Critical Comprex AG
Priority to AT89123633T priority Critical patent/ATE79164T1/de
Publication of EP0379715A1 publication Critical patent/EP0379715A1/fr
Application granted granted Critical
Publication of EP0379715B1 publication Critical patent/EP0379715B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F13/00—Pressure exchangers

Definitions

  • the present invention relates to a lightweight gas housing with channels for the conduction of gaseous or liquid media and flanges for connecting lines for the supply and discharge of these media into and out of the housing.
  • Housing according to the present invention are preferably components of thermal machines see. FR-A-2 261 420, in which a hot gas is supplied as a working medium and is led out as a relaxed exhaust gas.
  • Such housings have channels for the entering hot gas at high temperature and channels in the immediate vicinity of one another for the exiting, lower temperature cooled exhaust gas after its work. Because of the larger specific volume of the exhaust gas compared to the hot gas, its channel cross section is correspondingly larger.
  • channels of different cross-sections which are flowed through by gases of different pressures at different temperatures, which have different thermal expansions in the channel walls, in webs that may be present, in material accumulations that are practically impossible to avoid with cast parts, and also in the mounting flanges.
  • the present invention has for its object to avoid the disadvantages shown above as a replacement for the cast version of such gas housings to find a construction in which not only these disadvantages are avoided, but which is also more suitable and more economical for mass production than a cast version. Furthermore, this design should also broaden the range of materials that are suitable for high-temperature gas housings, i.e. that in addition to the relatively few castable high-temperature materials, the much wider range of semi-finished products that can be deformed without cutting, especially in the form of Sheet metal comes into consideration for such gas housings.
  • Such a construction should also allow, in addition to an expensive material for the high-temperature parts, to use less expensive material for the less heat-stressed parts, which preferably relates to the massive flange parts.
  • the more expensive, highly heat-resistant material also absorbs larger, thermally induced deformations due to its high elongation at break without fear of cracking. Its disadvantage of the higher price is usually at least compensated by the fact that the channel walls can be kept much thinner compared to castings.
  • the material-related advantages of a welded structure composed of thin-walled, shell-shaped pressed parts also result in a disadvantage, namely a reduced stability compared to cast structures.
  • This is of concern if, for example, forces are exerted by the housing on the hot gas-charged apparatus caused by vibrations to be forwarded, for example to the gas supply and discharge lines, which are connected to flanges of the channels mentioned at the beginning for the hot fresh gas and the relaxed exhaust gas.
  • the vibrations, supported by the material fatigue can lead to fractures in the channel walls.
  • the object of the invention is therefore also to keep the destructive influence of vibrations on the thin-walled gas-carrying ducts away by constructive measures. These measures consist of dividing the structure of the housing into a gas-carrying and a force-absorbing part.
  • the lightweight gas housing according to the invention is characterized in that the flanges mentioned are rigidly connected to one another and form a force-absorbing part of the housing, that the channels are formed as pressed sheet metal parts, and that the end cross sections of these channels have openings in at least one of the flanges with openings in at least one other Connect the flanges in a conductive manner, which openings are the inlet and outlet cross sections of the media and on which the ends of the channels are welded to the flanges.
  • the exemplary embodiment shown is the gas housing of a pressure wave charger for internal combustion engines. With two intake ducts, it absorbs the exhaust gases of the engine, which compress the combustion air in a cell rotor and flow into the exhaust system in a relaxed and cooled manner through two exhaust ducts.
  • the channels In the case of a design as a casting, the channels have common boundary walls, the two sides of which are exposed to differently hot gas, with the aforementioned risk of warping of the entire housing due to thermal stresses, which can also result in cracks.
  • the production is by casting due to the complicated routing of the channels complex and also very expensive due to the material, since the entire housing body consists of one and the same, very expensive material, whereas according to the invention a less expensive material is sufficient for the less temperature-stressed parts.
  • 1 means the force-absorbing part of the housing, which consists of two flange plates 2 and 3 made of sheet metal that can be deformed without cutting, each with legs that are perpendicular to one another.
  • the larger legs which in the figures are vertical and essentially parallel to one another, form flanges 4 and 5, of which one, 4, for connection to the rotor housing and the other, 5, receives the outlet part of an exhaust duct onto the bottom is received, and serves as a connection flange for the exhaust system of the engine.
  • the two other, shorter legs 6 and 7 of the flange plates 2 and 3 lie one on top of the other in the manner shown in FIGS. 2, 3 and 4 and are connected to one another along their parallel side edges by weld seams 8.
  • the leg 6 has an essentially rectangular opening 9, see FIGS. 3 and 4, while the leg 7 consists of two rod-shaped parts delimiting the opening 9 laterally.
  • the hot exhaust gas coming from the engine enters the housing, as indicated by the flow arrows 10.
  • the short leg 6 thus forms a flange for the connection of an exhaust pipe (not shown) coming from the engine and is therefore described below Called exhaust flange.
  • the flange 4 there are two diametrically opposed openings 11 through which the hot exhaust gas entering at 9 exits the housing and enters the cell rotor of the pressure wave charger, not shown.
  • the shape of the hot gas channel 12, which connects the opening 9 with the openings 11, can be seen from FIGS. 1, 2 and 3. Starting from the rectangular cross-section at the opening 9, where it is welded on its circumference to the underside of the exhaust flange 6, it widens upwards and branches into two branches, which are welded to the circumference of the openings 11 in the flange 4.
  • exhaust gas The expanded and cooled gas in the cell rotor, hereinafter called exhaust gas, enters, as the flow arrows 13 indicate, through the two diametrically opposite openings 14 in the flange 4 into the housing and leaves it in the region of a circular opening 15 in the flange 5, from where it continues to flow into an exhaust system, not shown.
  • the associated exhaust duct 16 begins with two branches on the two openings 14 of the flange 4, which merge downstream and merge into a circular connection piece which penetrates the opening 15 in the flange 5 and is connected to it by a weld seam 17.
  • the hot gas duct 12 and the exhaust duct 16 have no common walls and are therefore independent of one another with regard to the thermal expansions. Because of the greater elongation at break of the metal sheets which can be deformed without cutting than is the case with cast materials, there are cracks as can occur in cast workpieces due to their uneven wall thicknesses. not to be expected in the embodiments according to the invention.
  • the channels for the hot gas and the exhaust gas which at first glance appear to be complicated, are nevertheless cheaper to manufacture in series production than castings.
  • the channels consist of deep-drawn, half-shells welded to one another, the dividing lines being provided along their axis of symmetry or along suitable lines of contact of tangential planes or envelope surfaces. If necessary, undercuts must also be mastered in terms of production technology.
  • the welds can be robotized.
  • the weight saving compared to castings is very significant, which means lower costs, which can be reduced even further with a housing with channels that are subjected to different temperatures if the material quality that is sufficient for each channel is selected. Channels with less stress can therefore be pressed from cheaper material. Because of the free, mutually independent deformability of the Channels play different material properties, such as thermal expansion numbers for durability.
  • This type of housing is of course not only advantageous for thermally stressed machines, but is also an economical alternative to cast designs for other applications, e.g. for liquids and cold gases.
  • an insulating jacket 20 which is sealed with its edges to the flanges, the contour of which is indicated by dash-dotted lines in FIG. 3 and which encapsulates all or only the hot gas channels to the outside .
  • the latter are thermally insulated even better if the space surrounding the ducts, but especially the hot gas ducts, which is enclosed by the insulating jacket, is conductively connected to the hot gas ducts 12 via a bore 21, see FIG. 3, and is therefore surrounded by hot gas.
  • the insulating jacket also reduces noise emissions from the ducts. An even better noise reduction is obtained by filling the said space with a noise and heat insulating material.

Claims (5)

1. Corps à gaz de construction légère, avec des canaux (12, 16) pour conduire des fluides gazeux ou liquides et des brides (4, 5, 6) pour le raccordement de conduites d'arrivée et de retour de ces fluides dans respectivement hors du corps, caractérisé en ce que lesdites brides (4, 5, 6) sont rigidement reliées l'une en dessous de l'autre et forment une partie résistante (1) du corps, en ce que les canaux (12, 16) sont formés par des pièces embouties en tôle, et en ce que les sections terminales de ces canaux (12, 16) font communiquer des passages (9, 14) formés dans au moins une (6, 4) des brides avec des passages (11, 15) formés dans au moins une autre (4, 5) des brides, passages qui constituent les sections d'entrée respectivement de sortie des fluides et auxquels les extrémités des canaux (12, 16) sont soudées avec les brides (4, 5, 6).
2. Corps à gaz de construction légère suivant la revendication 1, constituant le corps à gaz d'un turbocompresseur à ondes de pression, avec des brides respectives (4, 5, 6) pour le raccordement au corps de rotor du turbocompresseur à ondes de pression, à la conduite des gaz d'échappement d'un moteur à combustion interne et à un tuyau d'échappement, ainsi qu'avec un canal à gaz chaud (12) et un canal d'échappement (16) pour l'évacuation des gaz d'échappement hors du moteur dans le rotor du turbocompresseur à ondes de pression respectivement pour l'évacuation des gaz d'échappement détendus et refroidis hors du rotor dans le tuyau d'échappement, caractérisé en ce que la bride (4) pour le raccordement au corps de rotor et la bride (6) pour le raccordement à la conduite des gaz d'échappement forment deux ailes perpendiculaires l'une à l'autre d'une plaque de bride (2), en ce que la bride (5) pour le raccordement au tuyau d'échappement fait partie d'une plaque de bride (3) qui présente deux ailes (7) en forme de barreaux perpendiculaires à la bride (5), en ce que la plaque de bride (3) est soudée le long des bords extérieurs de ces ailes (7) avec deux bords latéraux de la bride a gaz d'échappement (6), et en ce que le canal à gaz chaud (12) et le tuyau d'échappement (16) sont assemblés par soudage de deux demi-coquilles embouties et se divisent chacun à partir d'un passage unique (9, 15) formé dans la bride à gaz d'échappement (6) respectivement dans la bride d'échappement (5), en deux branches, qui se terminent chacune dans deux passages (18, 14) de la bride (4) du corps de rotor.
3. Corps à gaz de construction légère suivant la revendication 1, caractérisé par une enveloppe isolante (20), qui blinde au moins des canaux (12) conduisant les gaz chauds et qui est hermétiquement fixée par ses bords aux brides (4, 5, 6).
4. Corps à gaz de construction légère suivant la revendication 3, caractérisé en ce que les canaux (12) conduisant les gaz chauds communiquent par un trou (21) avec l'espace entouré par l'enveloppe isolante (20).
5. Corps à gaz de construction légère suivant la revendication 3, caractérisé en ce que l'espace délimité par l'enveloppe isolante (20), les brides (4, 5, 6) et les canaux (12, 16) est rempli d'une matière d'isolation phonique et thermique.
EP89123633A 1989-01-26 1989-12-21 Carter de gaz à construction légère Expired - Lifetime EP0379715B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89123633T ATE79164T1 (de) 1989-01-26 1989-12-21 Leichtbaugasgehaeuse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH25089 1989-01-26
CH250/89 1989-01-26

Publications (2)

Publication Number Publication Date
EP0379715A1 EP0379715A1 (fr) 1990-08-01
EP0379715B1 true EP0379715B1 (fr) 1992-08-05

Family

ID=4182722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89123633A Expired - Lifetime EP0379715B1 (fr) 1989-01-26 1989-12-21 Carter de gaz à construction légère

Country Status (5)

Country Link
US (1) US5051064A (fr)
EP (1) EP0379715B1 (fr)
JP (1) JPH02230921A (fr)
AT (1) ATE79164T1 (fr)
DE (1) DE58901999D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008052631A1 (de) * 2008-10-22 2010-04-29 Benteler Automobiltechnik Gmbh Gasdynamische Druckwellenmaschine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO306272B1 (no) * 1997-10-01 1999-10-11 Leif J Hauge Trykkveksler
WO2003023203A2 (fr) * 2001-07-06 2003-03-20 Advanced Research & Technology Institute Procede et systeme a onde de detonation pulsee ameliores dotes d'un ejecteur rotatif
DE102010008386B4 (de) * 2010-02-17 2012-07-05 Benteler Automobiltechnik Gmbh Druckwellenlader
DE102011054055B3 (de) * 2011-09-29 2012-09-27 Benteler Automobiltechnik Gmbh Druckwellenlader mit Hybridgehäuse
DE102011122864B3 (de) * 2011-09-29 2017-04-20 Benteler Automobiltechnik Gmbh Druckwellenlader mit gebautem Gehäuse

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB437078A (en) * 1934-01-24 1935-10-23 Alfred Buechi Improvements in or relating to arrangements of exhaust driven superchargers with multiple row internal combustion engines
US2759660A (en) * 1949-09-20 1956-08-21 Jendrassik Developments Ltd Pressure exchangers
DE1065866B (de) * 1957-07-25 1959-09-24 Dudley Brian Spalding, London Gasverflüssigungsanlage
GB936427A (en) * 1961-05-02 1963-09-11 Power Jets Res & Dev Ltd Improvements in or relating to pressure exchangers
GB1144262A (en) * 1966-06-28 1969-03-05 Power Jets Res & Dev Ltd Improvements in or relating to pressure exchangers
CH568476A5 (fr) * 1974-02-14 1975-10-31 Bbc Brown Boveri & Cie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008052631A1 (de) * 2008-10-22 2010-04-29 Benteler Automobiltechnik Gmbh Gasdynamische Druckwellenmaschine

Also Published As

Publication number Publication date
EP0379715A1 (fr) 1990-08-01
ATE79164T1 (de) 1992-08-15
DE58901999D1 (de) 1992-09-10
JPH02230921A (ja) 1990-09-13
US5051064A (en) 1991-09-24

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